Solve for x, y, z, a
a=32
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z=4\times 3+5\times 4
Consider the third equation. Insert the known values of variables into the equation.
z=12+20
Do the multiplications.
z=32
Add 12 and 20 to get 32.
a=32
Consider the fourth equation. Insert the known values of variables into the equation.
x=3 y=4 z=32 a=32
The system is now solved.
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